A couple years ago, I bought an Israeli surplus Beretta 84F. I got it for a plinker, because I had wanted one since I was young, and the price was low.
I never considered it as a serious use pistol.
Then, when I shot it, I found it fit my hand extremely well, so it pointed like a finger. I also found it to be completely reliable, and very accurate.
So, I started researching self defense 380 loads.
Since my pistol has a longer barrel to burn more powder, I went to the Underwood +P XTP load. I feel pretty well armed with 14 of those in this pistol.
As far as FMJ ammo, I would be fine with it, but most of the FMJ I’ve tried is made to price point, and doesn’t even perform to what the 380 is capable of. None of it is as good as the GECO FMJ I bought when I was young...Made in Germany, it had cupronickel jackets with lacquer sealant on the primer and case mouth, and seemed much more powerful than anything made in USA. I found 20rds from back then in my ammo stash, and my memory of how good this ammo performed was confirmed.